pkg/analyzer/test/src/dart/resolution/is_expression_test.dart

// Copyright (c) 2023, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:test_reflective_loader/test_reflective_loader.dart';

import 'context_collection_resolution.dart';

main() {
  defineReflectiveSuite(() {
    defineReflectiveTests(IsExpressionResolutionTest);
  });
}

@reflectiveTest
class IsExpressionResolutionTest extends PubPackageResolutionTest {
  test_expression_switchExpression() async {
    await assertNoErrorsInCode('''
void f(Object? x) {
  (switch (x) {
    _ => 0,
  } is double);
}
''');

    var node = findNode.isExpression('is double');
    assertResolvedNodeText(node, r'''
IsExpression
  expression: SwitchExpression
    switchKeyword: switch
    leftParenthesis: (
    expression: SimpleIdentifier
      token: x
      staticElement: self::@function::f::@parameter::x
      staticType: Object?
    rightParenthesis: )
    leftBracket: {
    cases
      SwitchExpressionCase
        guardedPattern: GuardedPattern
          pattern: WildcardPattern
            name: _
            matchedValueType: Object?
        arrow: =>
        expression: IntegerLiteral
          literal: 0
          staticType: int
    rightBracket: }
    staticType: int
  isOperator: is
  type: NamedType
    name: SimpleIdentifier
      token: double
      staticElement: dart:core::@class::double
      staticType: null
    type: double
  staticType: bool
''');
  }
}